Tom Huddlestone says Derby County have "a lot more in the tank" after they began the new season with a 1-1 draw against Sunderland.

Bradley Johnson gave the Rams an early lead at the Stadium of Light on Friday evening, only for Lewis Grabban to equalise from the penalty spot shortly before half-time after a handball by Jacob Butterfield.

Butterfield's arm appeared to make contact with the ball in the area as the midfielder fell to the ground.

Tom Huddlestone blocks a shot by James Vaughan

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Huddlestone, who made his second Rams "debut" after rejoining the club this summer, told Sky Sports: “They had a couple of chances first half and we were lucky going in 1-1 at half-time but a draw is probably a fair result.

“No-one thought it was a penalty at the time. Even if it was handball, it was a harsh one and I thought the referee (Oliver Langford) was guessing a little bit, but we had to get on and try and win the second half.

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“We have got a lot more in the tank. We can press better than that, play a lot better than what we showed.”

Derby are back in action on Tuesday evening when they travel to Grimsby Town in the first round of the Carabao Cup, before their first home league game of the season against Wolverhampton Wanderers on Saturday.